TY - JOUR AU - D. S. Dzhumabaev TI - Singular boundary-value problems and their approximation for nonlinear ordinary differential equations JO - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki PY - 1992 SP - 13 EP - 29 VL - 32 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZVMMF_1992_32_1_a1/ LA - ru ID - ZVMMF_1992_32_1_a1 ER -